USB 6008 Count Edges

[Cuchulain]

I am trying to count the edges on a signal with a period of 50us using the counter on a usb 6008.  Is this possible or is the period to small?

[ajmartin]

Well the 6008 data sheet says Min pulse  high= 100 NS and Min pulse  Low =100ns , Max frequency = 5Mhz. You can only count falling edges. So you should be able to count that.

For a sanity check you might want to try this. Connect a DI/O port to the counter in port and toggle the DI/O port a few times. This is just to demonstrate the counter is counting.

Alan

[Liam_A]

Hi there!

From the specifications listed at https://www.ni.com/en-us/support/model.usb-6008.html and https://www.ni.com/docs/en-US/bundle/usb-6008-6009-feature/page/introduction.html the minimum input pulse width is 100ns. Seeing that the period you are trying to measure is 50us, considerably bigger, then it should be fine.

I hope this clarifies,